Sealy Ortho Support Super King Mattress
The Sealy Ortho Support Mattress is available in five UK sizes, from Single up to Super King.
- Extra-firm feel for a flat surface
- Reinforced edges for more usable space
- Hypoallergenic fibre fillings
£827.10
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Sealy Ortho Support Mattress
More available sizes
Mattress details
Mattress
Sealy Ortho Support Mattress
Size
Firmness
Extra Firm
Construction
Orthopaedic
Depth (cm)
Layers
3
Layer Details
PostureTech 2.0 spring core
Sealy's PostureTech 2.0 smart spring core, made up of pocket springs individually encapsulated in fabric, forms the base of the mattress. It gives the firm support you would expect from an extra-firm build.
EdgeGuard surround
EdgeGuard surrounds the spring system and reinforces the sides and edges. That means you get more usable sleep surface, so you can sleep or sit nearer the edge without it feeling weak.
OptiForm extra-firm foam
A double layer of OptiForm extra-firm foam sits on top of the springs and gently cushions and adapts to your body. Expect a firm, fairly flat feel rather than a deep sink-in one.
Layer details from mattressman.co.uk product page, October 2026.
Key benefits
- The most space this model offers: At 180 x 200cm, the UK super king is the top of the Sealy Ortho Support range, so there is no bigger option to wonder about.
- Distance from a restless partner: With 90cm each for two people sharing, a partner who turns all night is simply further away, which does more for your sleep than any comfort layer.
- Room when children climb in: A small visitor at 3am is an inconvenience rather than an eviction, because a third body fits without pushing either adult to the edge.
- Space for pets who share as routine: If a large dog treats the bed as theirs too, the UK super king absorbs that habit without anyone sleeping diagonally.
- Fills a large master properly: In a period property or generous new build master, a UK king can look undersized against the room, while this footprint sits in proportion.
This size suits you if...
You share the bed every night and want genuine distance from a partner who turns constantly, your children or pets regularly join you and everyone still needs their own patch, or you have a large master bedroom where a smaller mattress would look lost. Allow at least 3m x 2.9m of floor space, with more feeling comfortable once wardrobes and bedside tables go in.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m minimum, or you would struggle to get a 180cm-wide mattress round your landing. We'd recommend the UK king instead: it's 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
Is the Sealy Ortho Support super king big enough for a family?
It is the most family-friendly size in the range. At 180 x 200cm it gives two adults 90cm each for two people sharing, so when a child wanders in at night there is usually still a workable share for everyone. No larger size exists in this model if you outgrow it.
What room size do I need for the Sealy Ortho Support in a UK super king?
We suggest at least 3m x 2.9m so you can walk round the bed and open drawers without shuffling sideways. In a loft conversion, the slope may decide which wall takes a 180cm-wide bed, so measure the usable head height along each wall before committing.
Should I choose the UK king or UK super king in this mattress?
The UK super king is 30cm wider than the UK King, and the two are the same length. If a restless partner or visiting children are the problem, the extra width earns the bigger room requirement. If your room only just clears 2.7m x 2.9m, the UK king is the safer fit.
Will the UK super king Sealy Ortho Support get up my stairs?
This is the size where access checks matter most. A 180cm-wide mattress can defeat a tight landing turn or narrow door swing, so measure the awkward points of your route before ordering. Sealy doesn't publish a weight for this mattress, so plan on two people carrying it.
How does the UK super king compare with the UK double for a couple?
The UK super king is 45cm wider than the UK Double and 10cm longer, which is the difference between negotiating space and forgetting your partner is there. The trade is room: we suggest at least 2.6m x 2.8m for the UK Double, against 3m x 2.9m for the UK super king.